Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

			Fair Value Measurements at March 31, 2019
	Total			Using Fair Value Hierarchy
Assets	Fair Value			Level 1		Level 2		Level 3
Company-owned life insurance	$	1,635		$	—	$	1,635	$	—
Total	$	1,635		$	—	$	1,635	$	—

			Fair Value Measurements at December 31, 2018
	Total			Using Fair Value Hierarchy
Assets	Fair Value			Level 1		Level 2		Level 3
Company-owned life insurance	$	1,491		$	—	$	1,491	$	—
Total	$	1,491		$	—	$	1,491	$	—